Changes have been made so that Canon imagePRESS C6011VP, C6011 printers not supported by macOS Sierra v10.12/OS X El Capitan v10.11/OS X Yosemite v10.10/OS X Mavericks OS X v10.9 will be deleted when installing the Canon imagePRESS C6011VP, C6011 printer driver on those operating systems.If the Canon imagePRESS C6011VP, C6011 printer you are using has been deleted, please add it again.